I'm pulling the OpenScad model - it's been a while since I used OpenScad and I had to dig through my archives to find it - so I'm not 100% sure on it's accuracy. Instead I am uploading a Solidworks part as well as a "new" version. This prints with exact tolerances on my new Prusa i3 and the dimensions in the cad file match the measured dimensions on the machine. It should press on with a tight fit. This new cad file differs from the original by ~ 0.3 mm on the hole size - which is about half a noodle + margin on my ToM which I printed the original design on. My Prusa does not need this additional margin.